The Development of Multi-functional Alternating Current Grid Simulator

In order to adapt to the grid test study a high power alternating current grid simulator that can simulate the network for various status and faults is proposed.The simulator could work in four quadrant operations，so that energy generated by distributed systems could flow into grid.The fundamental voltage and harmonic voltage are controlled respectively：multiple feedback loop control scheme is applied in fundamental mode and effective value feedback control scheme is applied in harmonic mode.The DSP and FPGA platform are used for implementing the system control and the experimental results show that the performance of the simulator is good and has high stability.